LCPD (Legge-Calve-Perthes disease)
LD (learning disability, academic disorders, learning disorder)
Landry-Guillain-Barrésyndrome (Guillain-Barré syndrome)
Langerhans histiocytoses (histiocytosis, pulmonary histiocytosis X, histiocytosis X, eosinophilic granuloma, nonlipid reticuloendotheliosis, Letterer-Siwe Disease, Hand-Schuller-Christian Disease, pulmonary Langerhans' granulomatosis)
Legge-Calve-Perthes disease (LCPD)
Legionnaires' disease (pneumonia)
Letterer-Siwe Disease (histiocytosis, pulmonary histiocytosis X, histiocytosis X, eosinophilic granuloma, nonlipid reticuloendotheliosis, Langerhans histiocytoses, Hand-Schuller-Christian Disease, pulmonary Langerhans' granulomatosis)
Lou Gehrig disease (amyotrophic lateral sclerosis, progressive bulbar palsy, ALS)
Lyme disease (amyotrophic lateral sclerosis, progressive bulbar palsy, ALS)
labyrinthitis (inner ear infection, otitis interna)
lactase deficiency (lactose intolerance)
lactose intolerance (lactase deficiency)
language disorders in children (communication disorders in children)
laryngeal cancer (cancer of the throat and larynx)
laryngeal nerve damage (cancer of the throat and larynx)
laryngitis (inflammation of the larynx)
latent phase (false labor, prelabor, Braxton Hicks contractions, prodromal labor)
lateral epicondylitis (tennis elbow, elbow tendonitis or tendinosis)
lead poisoning (lead toxicity, plumbism)
lead toxicity (lead poisoning, plumbism)
learning disability (LD, academic disorders, learning disorder)
learning disorder (learning disability, LD, academic disorders)
left-sided heart failure (congestive heart failure, heart failure, CHF)
leg pain (pain in the leg)
leiomyoma (uterine fibroids, myoma, fibromyoma)
leprosy (Hansen's disease)
lesions on the skin (skin lesions)
leukemia (skin lesions)
leukoplakia (skin lesions)
lichen planus (skin lesions)
lichen simplex chronicus (localized scratch dermatitis)
listeriosis (localized scratch dermatitis)
livedo reticularis (localized scratch dermatitis)
liver disease (localized scratch dermatitis)
liver spots (age spots, solar lentigo, solar lentigines, senile lentigo)
localized scratch dermatitis (lichen simplex chronicus)
lockjaw (tetanus)
lordosis (swayback, hollow back, saddle back)
loss of accommodation of the lens of the eye (presbyopia)
loss of bladder control (enuresis, bedwetting, bladder incontinence, uncontrollable urination)
loss of consciousness (unconsciousness)
lost interest in sex (sexual dysfunction in women, inhibited sexual desire, diminished libido, hypoactive sexual desire disorder, decreased sexual desire, decreased sex drive)
low back pain (sexual dysfunction in women, inhibited sexual desire, diminished libido, hypoactive sexual desire disorder, decreased sexual desire, decreased sex drive)
low birth weight (intrauterine growth retardation, small for gestational age, dysmaturity, intrauterine growth restriction)
low blood glucose (hypoglycemia, low blood sugar)
low blood pressure (hypotension)
low blood sugar (hypoglycemia, low blood glucose)
low body temperature (hypothermia, cold exposure)
lung edema (pulmonary edema, fluid in the lung)
lung embolus (pulmonary embolus)
lupus (systemic lupus erythematosus)